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Evolution of plant cell wall: Arabinogalactan-proteins from three moss genera show structural differences compared to seed plants

Author:
Bartels, Desirée, Baumann, Alexander, Maeder, Malte, Geske, Thomas, Heise, Esther Marie, von Schwartzenberg, Klaus, Classen, Birgit
Source:
Carbohydrate polymers 2017 v.163 pp. 227-235
ISSN:
0144-8617
Subject:
Magnoliophyta, Physcomitrella patens, Sphagnum, arabinogalactan proteins, cell walls, evolution, galactose, mosses and liverworts, proteoglycans
Abstract:
Arabinogalactan-proteins (AGPs) are important proteoglycans of plant cell walls. They seem to be present in most, if not all seed plants, but their occurrence and structure in bryophytes is widely unknown and actually the focus of AGP research. With regard to evolution of plant cell wall, we isolated AGPs from the three mosses Sphagnum sp., Physcomitrella patens and Polytrichastrum formosum. The moss AGPs show structural characteristics common for AGPs of seed plants, but also unique features, especially 3-O-methyl-rhamnose (trivial name acofriose) as terminal monosaccharide not found in arabinogalactan-proteins of angiosperms and 1,2,3-linked galactose as branching point never found in arabinogalactan-proteins before.
Agid:
5610875